- FondsMallarmé - The Mallarmé-Brennan collection
- SeriesC - Letters to Christopher John Brennan, with a list of Mallarmé's works
- ItemC1 - Autograph letter signed to Christopher Brennan
- ItemC2 - Autograph letter signed to Christopher Brennan
- ItemC3 - Manuscript list of Mallarmé's works
- ItemC4 - Autograph letter signed to Christopher Brennan
- ItemC5 - Autograph letter signed to Christopher Brennan
- ItemC6 - Autograph letter signed to Christopher Brennan
- ItemC7 - Autograph letter signed to Christopher Brennan
- 2 more...